Faces of the French Open

Spain's Rafael Nadal bites the Musketeers trophy after winning the 2013 French Open final against Spain's David Ferrer at the Roland Garros stadium in Paris on June 9, 2013.

Credit: KENZO TRIBOUILLARD/AFP/Getty Images

Spain's David Ferrer returns a shot to Spain's Rafael Nadal during the 2013 French Open final at the Roland Garros stadium in Paris on June 9, 2013.

Credit: MIGUEL MEDINA/AFP/Getty Images

Spain's Rafael Nadal celebrates his victory over Spain's David Ferrer at the end of their French Open final match at the Roland Garros stadium in Paris on June 9, 2013. Nadal beat Ferrer 6-3, 6-2, 6-3 to win his eighth French Open title.

Credit: PATRICK KOVARIK/AFP/Getty Images

A protester against same-sex marriage runs onto court with a lit flare during the Men's Singles final match between Rafael Nadal of Spain and David Ferrer of Spain, at the French Open at Roland Garros on June 9, 2013 in Paris, France. Security personnel wrested the man to the ground and quickly hauled him away. A guard stood near Nadal, protecting him, while the protester
was subdued. Nadal shook the guard's hand before resuming play.

Credit: Matthew Stockman/Getty Images

Serena Williams of the United States celebrates her victory over Russia's Maria Sharapova at the end of their French Tennis Open final match, at the Roland Garros stadium in Paris, June 8, 2013. Williams won her 16th Grand Slam title, and her first French Open championship since 2002.

Credit: KENZO TRIBOUILLARD/AFP/Getty Images

Maria Sharapova of Russia plays a forehand in her Women's Singles Final match against Serena Williams of United States during day 14 of the French Open at Roland Garros, June 8, 2013 in Paris, France.

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Serena Williams of the U.S. reacts after a point against Russia's Maria Sharapova during their French tennis Open final match at the Roland Garros stadium in Paris on June 8, 2013.

Credit: MIGUEL MEDINA/AFP/Getty Images

Russia's Maria Sharapova reacts after a point against Serena Williams of the U.S. during the 2013 French tennis Open final at the Roland Garros stadium in Paris on June 8, 2013.

Credit: PATRICK KOVARIK/AFP/Getty Images

Spain's Rafael Nadal returns to Japan's Nishikori Kei during their French Tennis Open round at the Roland Garros stadium in Paris, June 3, 2013.

Credit: Thomas Coex/AFP/Getty Images

Japan's Naoki Nakawaga returns the ball to Britain's Luke Bambridge during their singles first round match at the French Open tennis tournament, June 2, 2013.

Credit: Michel Spingler/AP

Alize Cornet of France returns against Victoria Azarenka of Belarus in their third round match at the French Open tennis tournament, June 1, 2013.

Credit: Michel Spingler/AP

Belarus' Victoria Azarenka returns to Italy's Francesca Schiavone during their French Tennis Open round, June 3, 2013.

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Spain's Rafael Nadal returns to Japan's Nishikori Kei during their French Tennis Open round, June 3, 2013.

Credit: Thomas Coex/AFP/Getty Images

Serena Williams, of the U.S, returns the ball to Roberta Vinci of Italy during their fourth round match of the French Open tennis tournament, June 2, 2013.

Credit: Petr David Josek/AP

Japan's Nishikori Kei returns to Spain's Rafael Nadal during their French Tennis Open round, June 3, 2013.

Credit: Thomas Coex/AFP/Getty Images

USA's Bethanie Mattek-Sands hits a return to Russia's Maria Kirilenko during a French tennis Open round, June 3, 2013.

Credit: Kenzo Tribouillard/AFP/Getty Images

Spain's Rafael Nadal returns to Japan's Nishikori Kei during their French Tennis Open round, June 3, 2013.

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Germany's Philipp Kohlschreiber returns to Serbia's Novak Djokovic during their French Tennis Open round, June 3, 2013.

Credit: Miguel Medina/AFP/Getty Images

Poland's Agniezska Radwanska serves against Serbia's Ana Ivanovic in their fourth round match at the French Open tennis tournament, June 2, 2013.

Credit: Michel Euler/AP

USA's Bethanie Mattek-Sands serves to Russia's Maria Kirilenko during a French tennis Open round, June 3, 2013.

Credit: Kenzo Tribouillard/AFP/Getty Images

Russia's Maria Kirilenko hits a return to USA's Bethanie Mattek-Sands after winning their French tennis Open round, June 3, 2013.

Credit: Patrick Kovarik/AFP/Getty Images

Kyle Edmund of Great Britain plays a forehand in his singles match against Bradley Mousley of Australia during day nine of the French Open, June 3, 2013.

Credit: Julian Finney/Getty Images

France's Richard Gasquet hits a return to Switzerland's Stanislas Wawrinka during a French tennis Open round, June 3, 2013.

Credit: Patrick Kovarik/AFP/Getty Images

Alejandra Cisneros of Mexico plays a forehand during her singles match against Antonia Lottner of Germany on day nine of the French Open, June 3, 2013.

Credit: Julian Finney/Getty Images

Italy's Francesca Schiavone returns against Victoria Azarenka of Belarus in their fourth round match at the French Open tennis tournament, June 3, 2013.

Credit: Michel Euler/AP

France's Richard Gasquet hits a return to Switzerland's Stanislas Wawrinka during a French tennis Open round, June 3, 2013.

Credit: Kenzo Tribouillard/AFP/Getty Images

Italy's Francesca Schiavone returns against France's Marion Bartoli in their third round match at the French Open tennis tournament, June 1, 2013.

Credit: Christophe Ena/AP

Italy's Sara Errani returns against Carla Suarez Navarro of Spain in their fourth round match at the French Open tennis tournament, June 2, 2013.

Credit: Michel Spingler/AP

Spain's Rafael Nadal returns against Japan's Kei Nishikori in their fourth round match at the French Open tennis tournament, June 3, 2013.

Credit: Michel Euler/AP

Kyle Edmund of Great Britain plays a backhand in his singles match against Bradley Mousley of Australia during day nine of the French Open, June 3, 2013.

Credit: Julian Finney/Getty Images

Novak Djokovic of Serbia serves during his Singles match against Philipp Kohlschreiber of Germany on day nine of the French Open, June 3, 2013.

Credit: Matthew Stockman/Getty Images

USA's Bethanie Mattek-Sands hits a return to Russia's Maria Kirilenko during a French tennis Open round of 16 match, June 3, 2013.

Credit: Kenzo Tribouillard/AFP/Getty Images

Maria Kirilenko of Russia plays a backhand during her singles match against Bethanie Mattek-Sands of the U.S. on day nine of the French Open, June 3, 2013.

Credit: Clive Brunskill/Getty Images

France's Richard Gasquet watches his shot against Switzerland's Stanislas Wawrinka during a French tennis Open round, June 3, 2013.

Credit: Kenzo Tribouillard/AFP/Getty Images

Antonia Lottner of Germany plays a backhand during her singles match against Alejandra Cisneros of Mexico on day nine of the French Open, June 3, 2013.

Credit: Julian Finney/Getty Images

As the world's elite tennis players gather for the French Open this week, a look at some of their most intense moments of concentration, exasperation and wonder on the court.

Melanie Oudin, of the U.S, eyes the ball as she plays China's Zheng Jie during their second round match of the French Open tennis tournament at the Roland Garros stadium, May 30, 2013 in Paris.

Credit: Petr David Josek/AP

USA's Sloane Stephens is to return the ball to Italy's Karin Knapp, during their first round match of the French Open tennis tournament at the Roland Garros stadium in Paris, May 27, 2013.

Credit: Petr David Josek/AP

Spain's Lourdes Dominguez Lino returns against Bethanie Mattek-Sands of the U.S. in their first round match of the French Open tennis tournament, at Roland Garros stadium in Paris, May 27, 2013.

Credit: Michel Spingler/AP

Vania King, of the U.S, returns the ball to compatriot Sloane Stephens during their second round match of the French Open tennis tournament at the Roland Garros stadium, May 30, 2013.

Credit: Michel Euler/AP

Maria Sharpova of Russia plays a forehand in her Women's Singles match against Hsieh Su-wei of Taiwan of during day two of the French Open, May 27, 2013.

Credit: Julian Finney/Getty Images

Mallory Burdette, of the U.S, return the ball to Poland's Agnieszka Radwanska during their second round match of the French Open tennis tournament at the Roland Garros stadium, May 29, 2013.

Credit: Michel Euler/AP

Serena Williams, of the U.S., returns the ball to Georgia's Anna Tatishvili during their first round match of the French Open tennis tournament at the Roland Garros stadium, May 26, 2013 in Paris.

Credit: Petr David Josek/AP

Michael Llodra of France returns against Canada's Milos Raonic in their second round match of the French Open tennis tournament, May 29, 2013.

Credit: Petr David Josek/AP

Serbia's Jelena Jankovic gestures biting her racket as she plays Slovakia's Daniela Hantuchova during their first round match of the French Open tennis tournament, May 28, 2013.

Credit: Petr David Josek/AP

France's Gael Monfils returns against Latvia's Ernests Gulbis in their second round match of the French Open tennis tournament, May 29, 2013.

Credit: Christophe Ena/AP

Madison Keys, of the U.S, returns the ball to Monica Puig, of Puerto Rico, during their second round match of the French Open tennis tournament, May 29, 2013.

Credit: Michel Spingler/AP

France's Kristina Mladenovic serves against Lauren Davis of the U.S. during their first round match at the French Open tennis tournament, May 28, 2013.

Credit: Michel Euler/AP

New Zealand's Marina Erakovic returns against Slovakia's Dominika Cibulkova in their second round match of the French Open tennis tournament May 30, 2013.

Credit: Michel Euler/AP

Spain's Nicolas Almagro returns the ball to France's Edouard Roger-Vasselin during their second round match of the French Open tennis tournament, May 29, 2013.

Credit: Michel Spingler/AP

Germany's Mona Barthel returns the ball to compatriot Angelique Kerber during their first round match of the French Open tennis tournament, May 27, 2013.

Credit: Christophe Ena/AP

Italy's Sara Errani serves to Arantxa Rus, of The Netherlands, during their first round match of the French Open tennis tournament, May 26, 2013.

Credit: Michel Euler/AP

Spain's Rafael Nadal serves the ball to Germany's Daniel Brands during their first round match of the French Open tennis tournament, May 27, 2013.

Credit: Michel Euler/AP

Bethanie Mattek-Sands, of the U.S, returns the ball to China's Li Na during their second round match of the French Open tennis tournament, May 30, 2013.

Credit: Michel Spingler/AP

Japan's Kei Nishikori returns against Slovenia's Grega Zemlja in their second round match of the French Open tennis tournament, May 30, 2013.

Credit: Christophe Ena/AP

Sloane Stephens, of the U.S, serves the ball to compatriot Vania King during their second round match of the French Open tennis tournament at the Roland Garros stadium, May 30, 2013.

Credit: Michel Euler/AP

Serbia's Jelena Jankovic returns the ball to Slovakia's Daniela Hantuchova during their first round match of the French Open tennis tournament, May 28, 2013.

Credit: Michel Spingler/AP

Stefanie Voegele of Switzerland serves against Britain's Heather Watson in their first round match of the French Open tennis tournament in Paris, May 29, 2013.

Credit: Michel Spingler/AP

Slovakia's Dominika Cibulkova returns against New Zealand's Marina Erakovic in their second round match of the French Open tennis tournament, May 30, 2013.